[mirror_ubuntu-artful-kernel.git] / drivers / acpi / button.c

/*
 *  button.c - ACPI Button Driver
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/input.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_BUTTON_CLASS		"button"
#define ACPI_BUTTON_FILE_INFO		"info"
#define ACPI_BUTTON_FILE_STATE		"state"
#define ACPI_BUTTON_TYPE_UNKNOWN	0x00
#define ACPI_BUTTON_NOTIFY_STATUS	0x80

#define ACPI_BUTTON_SUBCLASS_POWER	"power"
#define ACPI_BUTTON_HID_POWER		"PNP0C0C"
#define ACPI_BUTTON_DEVICE_NAME_POWER	"Power Button"
#define ACPI_BUTTON_TYPE_POWER		0x01

#define ACPI_BUTTON_SUBCLASS_SLEEP	"sleep"
#define ACPI_BUTTON_HID_SLEEP		"PNP0C0E"
#define ACPI_BUTTON_DEVICE_NAME_SLEEP	"Sleep Button"
#define ACPI_BUTTON_TYPE_SLEEP		0x03

#define ACPI_BUTTON_SUBCLASS_LID	"lid"
#define ACPI_BUTTON_HID_LID		"PNP0C0D"
#define ACPI_BUTTON_DEVICE_NAME_LID	"Lid Switch"
#define ACPI_BUTTON_TYPE_LID		0x05

#define _COMPONENT		ACPI_BUTTON_COMPONENT
ACPI_MODULE_NAME("button");

MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI Button Driver");
MODULE_LICENSE("GPL");

static const struct acpi_device_id button_device_ids[] = {
	{ACPI_BUTTON_HID_LID,    0},
	{ACPI_BUTTON_HID_SLEEP,  0},
	{ACPI_BUTTON_HID_SLEEPF, 0},
	{ACPI_BUTTON_HID_POWER,  0},
	{ACPI_BUTTON_HID_POWERF, 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, button_device_ids);

static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
static int acpi_button_resume(struct acpi_device *device);
static void acpi_button_notify(struct acpi_device *device, u32 event);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static int acpi_button_state_open_fs(struct inode *inode, struct file *file);

static struct acpi_driver acpi_button_driver = {
	.name = "button",
	.class = ACPI_BUTTON_CLASS,
	.ids = button_device_ids,
	.ops = {
		.add = acpi_button_add,
		.resume = acpi_button_resume,
		.remove = acpi_button_remove,
		.notify = acpi_button_notify,
	},
};

struct acpi_button {
	unsigned int type;
	struct input_dev *input;
	char phys[32];			/* for input device */
	unsigned long pushed;
};

static const struct file_operations acpi_button_info_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static const struct file_operations acpi_button_state_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_state_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_button_dir;

static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_device *device = seq->private;

	seq_printf(seq, "type:                    %s\n",
		   acpi_device_name(device));
	return 0;
}

static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
}

static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_device *device = seq->private;
	acpi_status status;
	unsigned long long state;

	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
	seq_printf(seq, "state:      %s\n",
		   ACPI_FAILURE(status) ? "unsupported" :
			(state ? "open" : "closed"));
	return 0;
}

static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
}

static struct proc_dir_entry *acpi_power_dir;
static struct proc_dir_entry *acpi_sleep_dir;
static struct proc_dir_entry *acpi_lid_dir;

static int acpi_button_add_fs(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);
	struct proc_dir_entry *entry = NULL;

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWER:
		if (!acpi_power_dir)
			acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
						    acpi_button_dir);
		entry = acpi_power_dir;
		break;
	case ACPI_BUTTON_TYPE_SLEEP:
		if (!acpi_sleep_dir)
			acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
						    acpi_button_dir);
		entry = acpi_sleep_dir;
		break;
	case ACPI_BUTTON_TYPE_LID:
		if (!acpi_lid_dir)
			acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
						  acpi_button_dir);
		entry = acpi_lid_dir;
		break;
	}

	if (!entry)
		return -ENODEV;

	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	if (!acpi_device_dir(device))
		return -ENODEV;

	/* 'info' [R] */
	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_button_info_fops, device);
	if (!entry)
		return -ENODEV;

	/* show lid state [R] */
	if (button->type == ACPI_BUTTON_TYPE_LID) {
		entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
					 S_IRUGO, acpi_device_dir(device),
					 &acpi_button_state_fops, device);
		if (!entry)
			return -ENODEV;
	}

	return 0;
}

static int acpi_button_remove_fs(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);

	if (acpi_device_dir(device)) {
		if (button->type == ACPI_BUTTON_TYPE_LID)
			remove_proc_entry(ACPI_BUTTON_FILE_STATE,
					  acpi_device_dir(device));
		remove_proc_entry(ACPI_BUTTON_FILE_INFO,
				  acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device),
				  acpi_device_dir(device)->parent);
		acpi_device_dir(device) = NULL;
	}

	return 0;
}

/* --------------------------------------------------------------------------
                                Driver Interface
   -------------------------------------------------------------------------- */
static int acpi_lid_send_state(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);
	unsigned long long state;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	/* input layer checks if event is redundant */
	input_report_switch(button->input, SW_LID, !state);
	input_sync(button->input);
	return 0;
}

static void acpi_button_notify(struct acpi_device *device, u32 event)
{
	struct acpi_button *button = acpi_driver_data(device);
	struct input_dev *input;

	switch (event) {
	case ACPI_FIXED_HARDWARE_EVENT:
		event = ACPI_BUTTON_NOTIFY_STATUS;
		/* fall through */
	case ACPI_BUTTON_NOTIFY_STATUS:
		input = button->input;
		if (button->type == ACPI_BUTTON_TYPE_LID) {
			acpi_lid_send_state(device);
		} else {
			int keycode = test_bit(KEY_SLEEP, input->keybit) ?
						KEY_SLEEP : KEY_POWER;

			input_report_key(input, keycode, 1);
			input_sync(input);
			input_report_key(input, keycode, 0);
			input_sync(input);
		}

		acpi_bus_generate_proc_event(device, event, ++button->pushed);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}
}

static int acpi_button_resume(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);

	if (button->type == ACPI_BUTTON_TYPE_LID)
		return acpi_lid_send_state(device);
	return 0;
}

static int acpi_button_add(struct acpi_device *device)
{
	struct acpi_button *button;
	struct input_dev *input;
	char *hid, *name, *class;
	int error;

	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
	if (!button)
		return -ENOMEM;

	device->driver_data = button;

	button->input = input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto err_free_button;
	}

	hid = acpi_device_hid(device);
	name = acpi_device_name(device);
	class = acpi_device_class(device);

	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
	    !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
		button->type = ACPI_BUTTON_TYPE_POWER;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
		   !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
		button->type = ACPI_BUTTON_TYPE_SLEEP;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
		button->type = ACPI_BUTTON_TYPE_LID;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
	} else {
		printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
		error = -ENODEV;
		goto err_free_input;
	}

	error = acpi_button_add_fs(device);
	if (error)
		goto err_free_input;

	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);

	input->name = name;
	input->phys = button->phys;
	input->id.bustype = BUS_HOST;
	input->id.product = button->type;
	input->dev.parent = &device->dev;

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWER:
		input->evbit[0] = BIT_MASK(EV_KEY);
		set_bit(KEY_POWER, input->keybit);
		break;

	case ACPI_BUTTON_TYPE_SLEEP:
		input->evbit[0] = BIT_MASK(EV_KEY);
		set_bit(KEY_SLEEP, input->keybit);
		break;

	case ACPI_BUTTON_TYPE_LID:
		input->evbit[0] = BIT_MASK(EV_SW);
		set_bit(SW_LID, input->swbit);
		break;
	}

	error = input_register_device(input);
	if (error)
		goto err_remove_fs;
	if (button->type == ACPI_BUTTON_TYPE_LID)
		acpi_lid_send_state(device);

	if (device->wakeup.flags.valid) {
		/* Button's GPE is run-wake GPE */
		acpi_set_gpe_type(device->wakeup.gpe_device,
				  device->wakeup.gpe_number,
				  ACPI_GPE_TYPE_WAKE_RUN);
		acpi_enable_gpe(device->wakeup.gpe_device,
				device->wakeup.gpe_number);
		device->wakeup.state.enabled = 1;
	}

	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
	return 0;

 err_remove_fs:
	acpi_button_remove_fs(device);
 err_free_input:
	input_free_device(input);
 err_free_button:
	kfree(button);
	return error;
}

static int acpi_button_remove(struct acpi_device *device, int type)
{
	struct acpi_button *button = acpi_driver_data(device);

	acpi_button_remove_fs(device);
	input_unregister_device(button->input);
	kfree(button);
	return 0;
}

static int __init acpi_button_init(void)
{
	int result;

	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	if (!acpi_button_dir)
		return -ENODEV;

	result = acpi_bus_register_driver(&acpi_button_driver);
	if (result < 0) {
		remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_button_exit(void)
{
	acpi_bus_unregister_driver(&acpi_button_driver);

	if (acpi_power_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	if (acpi_sleep_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	if (acpi_lid_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
}

module_init(acpi_button_init);
module_exit(acpi_button_exit);
Commit	Line	Data
1da177e4	1	/*
50a4da89	2	* button.c - ACPI Button Driver
1da177e4 LT	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
b34a8030 AS	29	#include <linux/types.h>
	30	#include <linux/proc_fs.h>
	31	#include <linux/seq_file.h>
c0968f0e	32	#include <linux/input.h>
1da177e4 LT	33	#include <acpi/acpi_bus.h>
	34	#include <acpi/acpi_drivers.h>
	35
1da177e4	36	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	37	#define ACPI_BUTTON_FILE_INFO "info"
	38	#define ACPI_BUTTON_FILE_STATE "state"
	39	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	40	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	41
	42	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	43	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
d68b597c	44	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
1da177e4	45	#define ACPI_BUTTON_TYPE_POWER 0x01
1da177e4 LT	46
	47	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	48	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
d68b597c	49	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
1da177e4	50	#define ACPI_BUTTON_TYPE_SLEEP 0x03
1da177e4 LT	51
	52	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	53	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	54	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	55	#define ACPI_BUTTON_TYPE_LID 0x05
	56
	57	#define _COMPONENT ACPI_BUTTON_COMPONENT
f52fd66d	58	ACPI_MODULE_NAME("button");
1da177e4	59
c0968f0e	60	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	61	MODULE_DESCRIPTION("ACPI Button Driver");
1da177e4 LT	62	MODULE_LICENSE("GPL");
1da177e4 LT	63
1ba90e3a TR	64	static const struct acpi_device_id button_device_ids[] = {
	65	{ACPI_BUTTON_HID_LID, 0},
	66	{ACPI_BUTTON_HID_SLEEP, 0},
	67	{ACPI_BUTTON_HID_SLEEPF, 0},
	68	{ACPI_BUTTON_HID_POWER, 0},
	69	{ACPI_BUTTON_HID_POWERF, 0},
	70	{"", 0},
	71	};
	72	MODULE_DEVICE_TABLE(acpi, button_device_ids);
	73
4be44fcd LB	74	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	75	static int acpi_button_remove(struct acpi_device *device, int type);
23de5d9e	76	static int acpi_button_resume(struct acpi_device *device);
373cfc36	77	static void acpi_button_notify(struct acpi_device *device, u32 event);
b34a8030 AS	78	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	79	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	80
1da177e4 LT	81	static struct acpi_driver acpi_button_driver = {
c2b6705b	82	.name = "button",
4be44fcd	83	.class = ACPI_BUTTON_CLASS,
1ba90e3a	84	.ids = button_device_ids,
4be44fcd LB	85	.ops = {
4be44fcd LB	86	.add = acpi_button_add,
23de5d9e	87	.resume = acpi_button_resume,
4be44fcd	88	.remove = acpi_button_remove,
373cfc36	89	.notify = acpi_button_notify,
c0968f0e	90	},
1da177e4 LT	91	};
	92
	93	struct acpi_button {
c0968f0e DT	94	unsigned int type;
	95	struct input_dev *input;
	96	char phys[32]; /* for input device */
4be44fcd	97	unsigned long pushed;
1da177e4 LT	98	};
1da177e4 LT	99
d7508032	100	static const struct file_operations acpi_button_info_fops = {
cf7acfab	101	.owner = THIS_MODULE,
4be44fcd LB	102	.open = acpi_button_info_open_fs,
	103	.read = seq_read,
	104	.llseek = seq_lseek,
	105	.release = single_release,
b34a8030 AS	106	};
b34a8030 AS	107
d7508032	108	static const struct file_operations acpi_button_state_fops = {
cf7acfab	109	.owner = THIS_MODULE,
4be44fcd LB	110	.open = acpi_button_state_open_fs,
	111	.read = seq_read,
	112	.llseek = seq_lseek,
	113	.release = single_release,
b34a8030	114	};
4be44fcd	115
b34a8030 AS	116	/* --------------------------------------------------------------------------
	117	FS Interface (/proc)
	118	-------------------------------------------------------------------------- */
	119
4be44fcd	120	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	121
	122	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	123	{
106c19e7	124	struct acpi_device *device = seq->private;
b34a8030	125
4be44fcd	126	seq_printf(seq, "type: %s\n",
106c19e7	127	acpi_device_name(device));
d550d98d	128	return 0;
b34a8030 AS	129	}
	130
	131	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	132	{
	133	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	134	}
4be44fcd	135
b34a8030 AS	136	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	137	{
106c19e7	138	struct acpi_device *device = seq->private;
4be44fcd	139	acpi_status status;
27663c58	140	unsigned long long state;
b34a8030	141
106c19e7	142	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	143	seq_printf(seq, "state: %s\n",
	144	ACPI_FAILURE(status) ? "unsupported" :
	145	(state ? "open" : "closed"));
d550d98d	146	return 0;
b34a8030 AS	147	}
	148
	149	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	150	{
	151	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	152	}
	153
	154	static struct proc_dir_entry *acpi_power_dir;
	155	static struct proc_dir_entry *acpi_sleep_dir;
	156	static struct proc_dir_entry *acpi_lid_dir;
	157
4be44fcd	158	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	159	{
1bce8113	160	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	161	struct proc_dir_entry *entry = NULL;
b34a8030 AS	162
	163	switch (button->type) {
	164	case ACPI_BUTTON_TYPE_POWER:
b34a8030	165	if (!acpi_power_dir)
4be44fcd LB	166	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	167	acpi_button_dir);
b34a8030 AS	168	entry = acpi_power_dir;
	169	break;
	170	case ACPI_BUTTON_TYPE_SLEEP:
b34a8030	171	if (!acpi_sleep_dir)
4be44fcd LB	172	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	173	acpi_button_dir);
b34a8030 AS	174	entry = acpi_sleep_dir;
	175	break;
	176	case ACPI_BUTTON_TYPE_LID:
	177	if (!acpi_lid_dir)
4be44fcd LB	178	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	179	acpi_button_dir);
b34a8030 AS	180	entry = acpi_lid_dir;
	181	break;
	182	}
	183
	184	if (!entry)
d550d98d	185	return -ENODEV;
b34a8030 AS	186
	187	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	188	if (!acpi_device_dir(device))
d550d98d	189	return -ENODEV;
b34a8030 AS	190
b34a8030 AS	191	/* 'info' [R] */
cf7acfab DL	192	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
cf7acfab DL	193	S_IRUGO, acpi_device_dir(device),
106c19e7	194	&acpi_button_info_fops, device);
b34a8030	195	if (!entry)
d550d98d	196	return -ENODEV;
b34a8030 AS	197
	198	/* show lid state [R] */
	199	if (button->type == ACPI_BUTTON_TYPE_LID) {
cf7acfab DL	200	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
cf7acfab DL	201	S_IRUGO, acpi_device_dir(device),
106c19e7	202	&acpi_button_state_fops, device);
b34a8030	203	if (!entry)
a6fc6720	204	return -ENODEV;
b34a8030 AS	205	}
b34a8030 AS	206
d550d98d	207	return 0;
b34a8030 AS	208	}
b34a8030 AS	209
4be44fcd	210	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	211	{
c0968f0e	212	struct acpi_button *button = acpi_driver_data(device);
b34a8030	213
b34a8030 AS	214	if (acpi_device_dir(device)) {
	215	if (button->type == ACPI_BUTTON_TYPE_LID)
	216	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	217	acpi_device_dir(device));
b34a8030	218	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	219	acpi_device_dir(device));
b34a8030 AS	220
b34a8030 AS	221	remove_proc_entry(acpi_device_bid(device),
4be44fcd	222	acpi_device_dir(device)->parent);
b34a8030 AS	223	acpi_device_dir(device) = NULL;
	224	}
	225
d550d98d	226	return 0;
b34a8030 AS	227	}
b34a8030 AS	228
1da177e4 LT	229	/* --------------------------------------------------------------------------
	230	Driver Interface
	231	-------------------------------------------------------------------------- */
106c19e7	232	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	233	{
106c19e7	234	struct acpi_button *button = acpi_driver_data(device);
27663c58	235	unsigned long long state;
23de5d9e AS	236	acpi_status status;
23de5d9e AS	237
106c19e7	238	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	239	if (ACPI_FAILURE(status))
23de5d9e AS	240	return -ENODEV;
50a4da89	241
23de5d9e AS	242	/* input layer checks if event is redundant */
23de5d9e AS	243	input_report_switch(button->input, SW_LID, !state);
df316e93	244	input_sync(button->input);
23de5d9e AS	245	return 0;
23de5d9e AS	246	}
1da177e4	247
373cfc36	248	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	249	{
373cfc36	250	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	251	struct input_dev *input;
1da177e4	252
1da177e4	253	switch (event) {
373cfc36 BH	254	case ACPI_FIXED_HARDWARE_EVENT:
	255	event = ACPI_BUTTON_NOTIFY_STATUS;
	256	/* fall through */
1da177e4	257	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	258	input = button->input;
c0968f0e	259	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	260	acpi_lid_send_state(device);
c0968f0e DT	261	} else {
	262	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	263	KEY_SLEEP : KEY_POWER;
	264
	265	input_report_key(input, keycode, 1);
	266	input_sync(input);
	267	input_report_key(input, keycode, 0);
df316e93	268	input_sync(input);
c0968f0e	269	}
c0968f0e	270
106c19e7	271	acpi_bus_generate_proc_event(device, event, ++button->pushed);
1da177e4 LT	272	break;
	273	default:
	274	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	275	"Unsupported event [0x%x]\n", event));
1da177e4 LT	276	break;
1da177e4 LT	277	}
1da177e4 LT	278	}
1da177e4 LT	279
23de5d9e AS	280	static int acpi_button_resume(struct acpi_device *device)
23de5d9e AS	281	{
1bce8113	282	struct acpi_button *button = acpi_driver_data(device);
50a4da89	283
e2fb9754	284	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	285	return acpi_lid_send_state(device);
23de5d9e AS	286	return 0;
	287	}
	288
c0968f0e DT	289	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	290	{
c0968f0e DT	291	struct acpi_button *button;
c0968f0e DT	292	struct input_dev *input;
bf04a772	293	char hid, name, *class;
1bce8113	294	int error;
1da177e4	295
c0968f0e	296	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	297	if (!button)
d550d98d	298	return -ENOMEM;
1da177e4	299
db89b4f0	300	device->driver_data = button;
1da177e4	301
c0968f0e DT	302	button->input = input = input_allocate_device();
	303	if (!input) {
	304	error = -ENOMEM;
	305	goto err_free_button;
	306	}
	307
bf04a772 BH	308	hid = acpi_device_hid(device);
	309	name = acpi_device_name(device);
	310	class = acpi_device_class(device);
	311
d68b597c BH	312	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	313	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	314	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	315	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	316	sprintf(class, "%s/%s",
1da177e4	317	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	318	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	319	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	320	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	321	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	322	sprintf(class, "%s/%s",
1da177e4	323	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	324	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	325	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	326	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	327	sprintf(class, "%s/%s",
1da177e4	328	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	329	} else {
bf04a772	330	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	331	error = -ENODEV;
c0968f0e DT	332	goto err_free_input;
1da177e4 LT	333	}
1da177e4 LT	334
c0968f0e DT	335	error = acpi_button_add_fs(device);
	336	if (error)
	337	goto err_free_input;
	338
bf04a772	339	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	340
bf04a772	341	input->name = name;
c0968f0e DT	342	input->phys = button->phys;
	343	input->id.bustype = BUS_HOST;
	344	input->id.product = button->type;
3b34e523	345	input->dev.parent = &device->dev;
b34a8030	346
1da177e4	347	switch (button->type) {
c0968f0e	348	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	349	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	350	set_bit(KEY_POWER, input->keybit);
1da177e4	351	break;
c0968f0e DT	352
c0968f0e DT	353	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	354	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	355	set_bit(KEY_SLEEP, input->keybit);
1da177e4	356	break;
c0968f0e DT	357
c0968f0e DT	358	case ACPI_BUTTON_TYPE_LID:
7b19ada2	359	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	360	set_bit(SW_LID, input->swbit);
1da177e4 LT	361	break;
	362	}
	363
c0968f0e DT	364	error = input_register_device(input);
c0968f0e DT	365	if (error)
373cfc36	366	goto err_remove_fs;
23de5d9e	367	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	368	acpi_lid_send_state(device);
1da177e4 LT	369
	370	if (device->wakeup.flags.valid) {
	371	/* Button's GPE is run-wake GPE */
4be44fcd LB	372	acpi_set_gpe_type(device->wakeup.gpe_device,
	373	device->wakeup.gpe_number,
	374	ACPI_GPE_TYPE_WAKE_RUN);
	375	acpi_enable_gpe(device->wakeup.gpe_device,
0b7084ac	376	device->wakeup.gpe_number);
1da177e4 LT	377	device->wakeup.state.enabled = 1;
	378	}
	379
bf04a772	380	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	381	return 0;
1da177e4	382
c0968f0e DT	383	err_remove_fs:
	384	acpi_button_remove_fs(device);
	385	err_free_input:
	386	input_free_device(input);
	387	err_free_button:
	388	kfree(button);
	389	return error;
1da177e4 LT	390	}
1da177e4 LT	391
4be44fcd	392	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	393	{
1bce8113	394	struct acpi_button *button = acpi_driver_data(device);
1da177e4	395
4be44fcd	396	acpi_button_remove_fs(device);
c0968f0e	397	input_unregister_device(button->input);
1da177e4	398	kfree(button);
d550d98d	399	return 0;
1da177e4 LT	400	}
1da177e4 LT	401
4be44fcd	402	static int __init acpi_button_init(void)
1da177e4	403	{
c0968f0e	404	int result;
1da177e4	405
b34a8030 AS	406	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	407	if (!acpi_button_dir)
d550d98d	408	return -ENODEV;
50a4da89	409
1da177e4 LT	410	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	411	if (result < 0) {
b34a8030	412	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	413	return -ENODEV;
1da177e4 LT	414	}
1da177e4 LT	415
d550d98d	416	return 0;
1da177e4 LT	417	}
1da177e4 LT	418
4be44fcd	419	static void __exit acpi_button_exit(void)
1da177e4	420	{
1da177e4 LT	421	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	422
4be44fcd	423	if (acpi_power_dir)
b34a8030 AS	424	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	425	if (acpi_sleep_dir)
	426	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	427	if (acpi_lid_dir)
	428	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	429	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	430	}
1da177e4 LT	431
1da177e4 LT	432	module_init(acpi_button_init);
1da177e4 LT	433	module_exit(acpi_button_exit);